Due Date Calculator

Calculate your baby's due date with countdown

🔒 Files never leave your browser

Calculate From

Last Menstrual Period Conception Date

Last Menstrual Period Date

This tool is for informational purposes only. Consult a healthcare professional.

How to Use Due Date Calculator

Calculate from last period or conception date.

Select the relevant date.

See due date with countdown and timeline.

What is the difference between LMP and conception date? ▼

LMP (Last Menstrual Period) is about 2 weeks before conception. Both methods give the same due date.

Is there a file size limit? ▼

No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.

Which browsers are supported? ▼

All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.

Can I use this offline? ▼

Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.

Is my data secure? ▼

Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.

Does this work on mobile? ▼

Yes. All AllTools tools are fully responsive and work on phones and tablets.

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